The LipiView Ocular Surface Interferometer is a HSA-approved imaging device that allows clinicians evaluate the characteristics and thickness of the tear lipid layer thickness (LLT) in a safe and non-invasive manner. The device utilizes white light from a LED source that is directed at the tear film over the inferior corneal region. Reflected light is captured by a high resolution camera and the optical inference pattern is evaluated by software to determine the LLT. 2 It also was found to correlate with other dry eye diagnostic tests, such as tear film break-up time (TBUT), Schirmer's test and corneal staining 3,4,5,6. LLT is also reported to better correlate with symptoms than other objective dry eye tests. 2